Fix duplicate favourites again (issue 2400)

OsmAnd/src/net/osmand/plus/FavouritesDbHelper.java

@@ -196,7 +196,6 @@ public class FavouritesDbHelper {
 			} else {
 				builder.setMessage(uiContext.getString(R.string.fav_point_dublicate_message, name));
 			}
-			builder.setPositiveButton(R.string.shared_string_ok, null);
 			p.setName(name);
 			return builder;
 		}
@@ -231,6 +230,7 @@ public class FavouritesDbHelper {
 			++index;
 		}
 
+		builder.trimToSize(); // remove trailing null characters
 		return builder.toString();
 	}
 

OsmAnd/src/net/osmand/plus/dialogs/FavoriteDialogs.java

@@ -221,6 +221,7 @@ public class FavoriteDialogs {
 							addFavorite(activity, point, helper);							
 						}
 					});
+					bld.show();
 				} else {
 					addFavorite(activity, point, helper);
 				}